SUBJECT: ANTENNAS AND WAVE PROPAGATION 1. Define an antenna. Antenna is a transition device or a transducer between a guided wave and a free space wave or vice versa. Antenna is also said to be an impedance transforming device. 2. What is meant by radiation pattern? Radiation pattern is the relative distribution of radiated power as a function of distance in space .It is a graph which shows the variation in actual field strength of the EM wave at all points which are at equal distance from the
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1. In the lab activity‚ you will examine sound waves as they are emitted from a moving source. Predict what will happen to the sound waves when the sound source is in motion. Record your prediction (hypothesis) as an “if then” statement. (For example: If you select the GO button‚ then the train will move) If the sound source is moving then when the sound gets closer‚ the volume will increase and when the sound passes by you‚ the volume will start decreasing. 2. Select the boy icon. Select the
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have contributed to theories involving light. Of these‚ the wave-particle duality is arguably the most strange and noteworthy concept in the field. Throughout history‚ some physicists have argued that light behaves as a wave‚ such as Christiaan Huygens and others‚ such as Isaac Newton have proposed that light consists of particles (Wave-Particle Duality‚ March 2010). Today‚ as stated in the wave-particle duality‚ light is said to exhibit wave-like and particle-like properties. And still today‚ physicists
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Author Rick Yancey‚ published on May 8‚ 2013‚ The 5th Wave. This novel occurred in present-day Dayton‚ Ohio. The 5th Wave is a novel about a sixteen-year-old named Cassiopeia “Cassie” Sullivan that tries to survive an alien invasion. The aliens‚ also known as the Others‚ attacked in five waves. The first wave was when the alien spaceship sent an electromagnetic pulse that caused all the electricity and technology to be shorted out. The second wave caused a tsunami that was heading towards Cassie and
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The Path of Light and Sound By: Kristin Jaskowiak The organ that gives us a sense of sight is our eyes. Of the five senses‚ our eyes allow us to learn the most about our surroundings. It is important to know the structures and anatomy that make up the eyes to gain a better understanding of how light and images are processed to become sight. ANATOMY The lacrimal gland‚ or tear duct‚ produces tears when stimulated by the facial nerve. The delicate‚ transparent mucous membrane that covers the
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its booming and trendsetting entertainment industry. The new image gained from the Hallyu Wave has also paved the way for smoother global transaction and relation. (Lee‚ Sue Jin 2-3) This new image embodies the more positive yet intrinsic qualities of the Korean spirit: A spirit of industrialism‚ passion and innovation for their work. The Korean government has also recognized the potential of the Hallyu Wave as the nation’s prime export. Hallyu has been deemed as the nation’s ‘soft power’ due to its
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use of recorded sound in films was a technological achievement that would dramatically change the way audiences experience cinema. The transition from silent cinema affected many studios and filmmakers‚ who had to adapt to the new technology to prevent their careers from fading into obscurity. One filmmaker who was able to adapt to the changing industry was director Fritz Lang. The Austrian born director‚ whose career began in post-war Germany in 1919‚ made the transition to sound in 1931 with the
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the friction of the jagged edges of the fault and it unsticks‚ all that stored up energy is released. The energy radiates outward from the fault in all directions in the form of seismic waves like ripples on a pond but much more violent. The seismic waves shake the earth as they move through it‚ and when the waves reach the earth’s surface‚ they shake the ground and anything on it‚ like our houses and workplaces. The tool that scientists use to record and measure earthquakes is called
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Speed of Sound in Air By: James Chen Lab Partner: Jin Zhang and Jake Salpeter Phys 130‚ Lab section: EE11 TA: Khaled Elshamouty Date of lab: October 29‚ 2013 Introduction Sound is a longitudinal (compressional) wave caused by a vibrating source. In this experiment‚ we use standing sound waves created by the tuning forks to determine the speed of sound in air in a tube when it reaches different resonances. In this lab we focused primarily on using standing sound waves (compressional
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so-called kingdom. My job is simple‚ go kill her and save the Earth. Sounds pretty heroic right‚ yep‚ it’s easier said than done! I have been asking myself that ‘why me?’ I hate Ice! She has practically sunk the entire world‚ but she has left small ledge for me to give myself a pre-battle pep talk. First ice ledges surrounded by piranhas‚ serious loyal creatures you know. Then the mirror maze‚ worst of all comes last of all‚ the Wave. Okay after just three horrifying obstacles that can nearly kill you
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